diff --git a/mantidimaging/eyes_tests/live_viewer_window_test.py b/mantidimaging/eyes_tests/live_viewer_window_test.py
index 2399cbe3eab..6869b8163bf 100644
--- a/mantidimaging/eyes_tests/live_viewer_window_test.py
+++ b/mantidimaging/eyes_tests/live_viewer_window_test.py
@@ -42,7 +42,8 @@ def _make_simple_dir(self, directory: Path):
 
         return file_list
 
-    def test_live_view_opens_without_data(self):
+    @mock.patch('mantidimaging.gui.windows.live_viewer.model.ImageWatcher')
+    def test_live_view_opens_without_data(self, _mock_image_watcher):
         self.imaging.show_live_viewer(self.live_directory)
         self.check_target(widget=self.imaging.live_viewer)